This item is a mini sound box, which is made with high-grade plastic, wear-resistant and sturdy for a time use. Good workmanship and outstanding sound quality, premium texture, very practical. Application to music playback such , mobile phone, etc. Features - Color: White. - Material: Plastic, electronic components. - 4 times the volume increase, you can listen to anything you want at any time. - The mini portable speaker no need to download any driver and wait a , just only plug it into your device directly and turn on the power, then you will enjoy loud voice immediately. - Can amplify your device volume up to 4 times and lets you enjoy the lossless loud voice. - Compact and lightweight design, easy to pack in your briefcase, and handbag and carry to anywhere for using it anytime. - It works with any media device with a 3.5mm such as mobile phone, tablet, laptop, just turn power on and plug it directly to play music or video audio. Specification: Speaker power: 3.7V 350mAh. Output power: 3W. Frequency response: 50-18000HZ. +N: 3%. Plug specifications: 3.5mm. Charging voltage: DC5V 500mA. Output impedance: 40HM. Signal to noise ratio: >80dB. Speaker size: 1.4 inches. Package list: 1 x loudspeaker